Oil-pump lubricator.



L. KASSANDBR dz E. A. KELSEY.

OIL PUMP LUBRIGATOR. APPLICATION FILED JUNE 25, 1908.

Patented Dec. 29, 1908.

wi fdfl f wgw 5 72$ fim w V W WW fif/f/ if m fimr F W MM Fwd H l mmu UNITED STATES PATENT OFFICE.

LEOPOLD KASSANDEB, or NEW YORK, AND EDGAR KELSEY, or MOUNT VERNON, YORK, assienoas T NATHAN MANUFACTURING COMPANY, or new year, n. Y.

OIL-PUMP LUBRICATOR.

Specification of Letters Patent.

Patented Dec. 29, 1808;.

To all whom it may concern:

Be' it known that We, LEOPOLD KAssANonR and EDGAR A. KELSEY, citizens of the United States, residing, respectively, in the .city, county, and State of New York, and in the city of Mount Vernon, county of \Vestchester, and State of New York, have invented certain new and useful Improvements in Oil- Pump Lubricators for the Lubrication of Bearings Under Pressure, of which the following is a full and clear description.

In oil pump lubricators of this description, as usually constructed, the plunger operates in an open cylinder, and, unless the plunger is fitted into the cylinder very tightly, the oil, on the pressure stroke of the plunger, is liable to be pressed back into the reservoir through the minute space between the exterior of the plunger and the interior of the cylinder, wherebythe pump'loses its efliciency, and will not deliver the oil to the part to be lubricated. On the other hand, a very tightly fitted plunger has the disadvantage that it operates stiflly, binds in the cylinder and may break or bend under the strain. 7

Oil puin s heretofore made with a closed plunger-Cy inder, that is, with packing around the plunger, usually become what is termed in the art air-bound that is, when, as a result of carelessness or oversight on the part of the operator, air is pumped into the plunger-cylinder, it has no avenue of esca e from it, which materially influences, or a together prevents, the proper operation of the pump. Pumps of this description are usually provided with a suction and a pressure valve, but, as heretofore constructed, these valves as a rule are lifted to their seats by the pressure against which the pump operates, assisted in most cases by a sprln and experience is that these valves are d1 ficult to keep tight. In some cases such pumps are made with gravity valves, but, as far as we know, when so made they require special delivery connections and joints,

7 makin the construction and the application of the pump cumbersome and complicated.

The object of our invention is to overcome all these defects and inconveniences in the construction of a pump of this description,

making the construction more compact, reliable and eflicient. I

In the accompanying drawing to which we shall now refer for a more complete understanding of our improvementsF i are 1 is an axial section of the lubricator. ig. 2 is a section on line 22 Fig. 1, of the body casting, omitting other parts.

A is the oil reservoir, preferably consisting of a glass vessel, held tight between ca B at the top and the rim of the body part at the bottom. These two parts are drawn together by means of the filler cap D and the slotted tube E, which screws upon the threaded neck F of body part C. The lower portion G of the tube E also forms a packing nut, packing material being inserted in the space H between the top of the threaded neck F and the bottom of G.

K is the plunger of the pump, operated by means of the handle L, which is pivoted to the plunger at M and to an oscillating fu l;

- crum at N in the usual manner. The plunger moves in the cylindrical bore of the neck "F,

which constitutes the plunger-cylinder, and it will be noticed that in the highest position, presented in the drawing, the lower portion of the plunger remains below the packing at H, so that no oil can pass back into the reservoir, as the plunger is tightly packed by means of the arrangement shown and described. It will also be noticed. that, for the purpose of ventingthe plunger-cylinder, the plunger is provided with a vent assage which extends through it for some istance upward from its lower end and then terminates in a lateral opening in the plunger so located that it comes slightly above the pack-' lunger-so that any air which may get into the plunger cylinder will have an opportunity to escape as soon as the plunger starts on the downward stroke, thereby venting the plunger cylinder and preventing it from becoming air-bound The mouth of the cross bore 0 is of course closed except when the plum er is raised.

P is the suct1on valve and P the pressure valve. The suction valve finds its seat in the body castin C at the bottom of the plunger cylinder. n openin Q leads by means of an oblique passage or ore from the chamber R below the suction valve into the oil reservoir. A cored passage 8 leads from above the suction valve P to below the pressure valve P, and anothercored assage T leads from above the pressure va ve to the inlet of the valve U, which forms the final outlet for the oil, and by means of which the pump is scre'wedto the part to be lubricated.

V is a pin and \V a plug to limit the stroke vnecting pieces w atever, constituting a very compact and efficient arrangement, with no more joint points than in any ordinary oil pump not einbodyin our improvements. It will also be observe that any back pressure from the deliver side will act 11 on the top of valves P and Psimply ho din them to their seats, and is not required to li t them up to their seats, as in pumps of ordinary construction.

Having described our improvements and the best way now known to us of carrying the same into practical effect we state in conclusion that we do not limit ourselves strictly to the structural details herein set forth in illustration of our invention, for, manifestly, the same can be varied in a number of particulars without departure from the spirit of the invention: But

What we claim as new and desire to secure by Letters Patent is as follows: I

1. The combination with an oil reservoir, a plunger cylinder and an oil passage leadmg direct from the reservoir to the cylinder,

of a plunger provided with an air vent paspassa e communicating at its lower end with u .the p unger cylinderyand at its upper end opening'out through the side of the plunger at a point to communicate with the reservoir when the plunger is in its highest position,

substantially as and for the purposes hereinbefore set forth.

3. In an oil pump of tlie character de scribed, an oil reservoir, a plunger cylinder and an oil passage Q, from the oil reservoir to the plunger cylinder, in combination with a plunger having a vent passage independent of and separate from the oil passage and comprising an axial bore 0 and a cross bore 0 meeting the axial bore, substantially as and for the purposes hereinbefore set forth.

4. In an oil pump of the character described, a single lnte 'ral body casting formed with plunger cylinder, pressure and .suction valve'seats and oil inlet passages,

and a vented plunger fitted to and adapted to work in the plunger cylinder, as set forth.

In testimony whereof we afiix our signatures in presence, of two witnesses.

LEOPOLD KASSANDER. EDGAR A. KELSEY. 

